Assertion (A) states that Space Based Solar Power (SBSP) should be a national goal. This is a policy suggestion based on the potential benefits of SBSP. Reason (R) provides a key justification for pursuing SBSP: its supply is nearly uninterrupted (around 99% availability year-round, as satellites are above weather and night cycles, only shadowed during brief eclipses by Earth) and the potential energy available from the sun is enormous.